A number of measures were introduced at the time, including increased security at schools across the country and a regulation requiring people to register with their national ID cards when buying large knives.

CNN’s Serena Dong contributed to this report.

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There was a deadly attack at a primary school in China this morning.

A man killed three people, and then took his own life by jumping off of the building.

This is according to the state media.

We will continue to bring you the latest as new information becomes available.